Hardshell Keep

 is one of the areas in First Exploration: Silent Ruins.

Possible Fiend Encounters

 * Dust Soldier (Fire)
 * Dust Warrior (Fire)
 * Grudge Fighter (Fire)
 * Dust Mage (Water)
 * Dust Sorcerer (Water)
 * Grudge Shaman (Water)
 * Dust Ripper (Wind)
 * Dust Hunter (Wind)
 * Grudge Ranger (Wind)
 * Grudge Wizard (Water)